Nice leash. It's bunji inside, but the outside is tough nylon, should last a long time.
Much better than using normal cords to hold your mirage drive. My cords that I made kept getting tangled in everything. These leashes are easy to use and have a easy detachment clip on them. I bought this for my Hobbie Mirage Adventure. The drive attachment bungee could be made a little more secure, but otherwise this works well. Do not go out past the surf without one of these on your kayak. You will regreat it!